280 results about "Alloy composite" patented technology

A hardened alloy composite material comprising an alloy matrix and reinforcing particles dispersed in the alloy matrix, the reinforcing particles having a shell and core structure, wherein the shell and the core have different chemical compositions, and wherein the reinforcing particles are formed by a MAX phase compound and / or a MAB phase compound.

The invention relates to the technical field of metal materials, in particular to a ceramic reinforced aluminum alloy composite material and a preparation method thereof. The aluminum alloy composite material comprises the following raw materials in parts by weight: 75-85 parts of an aluminum alloy matrix and 10-20 parts of a ceramic reinforced phase, a preparation method of the ceramic reinforced phase comprises the following steps: step 1, adding silicon carbide and a silane coupling agent into absolute ethyl alcohol, and drying after ultrasonic dispersion; 2, dissolving tetraethoxysilane in an ethanol-water mixed solvent, adjusting the pH value to 3-4, adding the silicon carbide treated in the step 1, stirring to form sol, drying, converting into gel, and calcining to form a coating layer; step 3, dispersing the silicon carbide treated in the step 2 into water, adding nickel nitrate, uniformly stirring, adding a reducing agent, stirring for reaction, and collecting precipitate particles; and 4, adding an interface modifier, and uniformly mixing. The ceramic reinforced aluminum alloy composite material has high strength, high wear resistance and good mechanical property and thermal stability.

A deformation-driven additive manufacturing method for a low-interfacial-stress aluminum-steel composite structure comprises the steps that an aluminum alloy thin tube is filled with an adding phase with a low thermal expansion coefficient or a negative thermal expansion coefficient and aluminum-silicon powder used for enhancing the thermal plasticizing fluidity of a raw material wire according to the proportion, and after drying treatment, the raw material wire for adjusting the thermal expansion coefficient is manufactured; a continuous wire feeding friction stir additive manufacturing method is adopted, aluminum alloy raw material wires and adjusting raw material wires are synchronously fed according to the rate proportion changing layer by layer, deposition is driven through deformation, and an aluminum alloy composite transition layer with additive phase components changing in a gradient mode is formed; after the aluminum alloy composite material transition layer is completely prepared, the continuous wire feeding friction stir additive manufacturing method is continuously adopted, and continuous deposition is conducted on the aluminum alloy composite material transition layer to form an aluminum alloy deposition layer; and after deposition manufacturing of the component is completed, subtractive machining treatment is carried out, and a final product is obtained. The invention relates to the technical field of dissimilar material additive manufacturing.

The invention discloses a preparation method of a copper-zirconium alloy wear-resistant coating based on laser cladding, relates to the technical field of wear-resistant coatings, and is used for solving the technical problem that a high-performance wear-resistant coating cannot be prepared due to poor bonding quality and low cladding efficiency of a cladding layer and a copper-zirconium alloy matrix in the existing laser cladding process. The preparation method of the copper-zirconium alloy wear-resistant coating based on laser cladding comprises the following steps: obtaining a copper-zirconium alloy matrix; preparing a CuSn film layer on the surface of the copper-zirconium alloy matrix, wherein the thickness of the CuSn film layer is 0.5-2 microns; preparing an iron-based coating on the surface of the CuSn film layer, wherein the thickness of the iron-based coating is 0.8-1.0 mm; preparing a wear-resistant layer on the surface of the iron-based coating, wherein the thickness of the wear-resistant layer is 1-1.2 mm; the material for preparing the wear-resistant layer is nickel-based alloy composite ceramic powder, and the nickel-based alloy composite ceramic powder comprises nickel-based alloy and ceramic powder.

The invention relates to the technical field of heat exchange, and particularly discloses a gallium-based alloy composite working medium and a preparation method thereof.The gallium-based alloy composite working medium comprises a main heat transfer fluid and nano particles dispersed in the main heat transfer fluid, and the main heat transfer fluid is liquid gallium-based alloy; the nano particle comprises a metal core, a non-metal shell layer coated outside the metal core and a carbon nano material layer coated outside the non-metal shell layer. The carbon nanomaterial is modified on the surface of the non-metal shell layer, the dispersion condition of nanoparticles in liquid metal is effectively improved, and meanwhile, the carbon nanomaterial can effectively mask silicon hydroxyl on the surface of the non-metal shell layer and prevent self-polymerization tendency between the non-metal shell layers by modifying the surface of the non-metal shell layer.

The embodiment of the invention discloses an injection-molded long carbon fiber reinforced polyether-ether-ketone alloy composite material and a preparation method thereof. Nano filler modified polyether-ether-ketone alloy powder is prepared from polyether-ether-ketone, modified resin and a nano modifier; preparing soft and hard sizing agent hybrid modified long carbon fibers from continuous carbon fibers and the prepared sizing solution; nano-filler modified polyether-ether-ketone alloy powder, a deionized water solution containing a surfactant and a thickening agent and soft and hard sizing agent mixed modified long carbon fibers are adopted to prepare long carbon fiber master batches; and carrying out injection molding on the long carbon fiber master batch by adopting an optimized injection molding process to prepare the long carbon fiber reinforced polyether-ether-ketone alloy composite material. The mechanical properties, electric conduction, heat conduction and friction properties of the composite material are greatly improved, and the defects of a polymer material in the aspect of functionality are further made up; moreover, the effective retention length of fibers in the injection molding master batch is greatly increased, the organic solvent is prevented from damaging molecular chain segments of a resin matrix, and the injection molding master batch is more environment-friendly.

The invention discloses a graphene / aluminum alloy composite material with high conductivity and a preparation method thereof, and belongs to the technical field of metal-based composite materials. And the electric conductivity is not lower than 70% IACS. The preparation method comprises the following steps: carrying out surface copper plating pretreatment on aluminum alloy powder; performing ultrasonic dispersion on graphene by using a polyvinyl alcohol solution to obtain a stable dispersion liquid; mixing, stirring, drying and filtering the copper-plated powder and the graphene dispersion liquid to obtain graphene-coated composite powder; and finally, carrying out rapid densification sintering by adopting a spark plasma sintering technology. The core innovation point of the preparation method is that the problem of dispersion and interface combination of graphene in an aluminum matrix is solved synergistically through combination of a copper plating transition layer and PVA auxiliary dispersion-adsorption coating, then interface reaction is avoided through SPS rapid sintering, finally, the composite material with excellent conductivity is obtained, and the technical index reaches the domestic leading level.

The invention belongs to the technical field of surface engineering, and relates to a preparation method of a protective coating for a metal connector of a solid oxide battery. A compact transition metal oxide inner layer is deposited on a metal substrate in a reactive sputtering mode, then a transition metal alloy outer layer is deposited in a metal sputtering mode, a transition metal oxide / transition metal alloy composite coating is formed, and a spinel protective layer is formed after annealing treatment. According to the method, a transition metal oxide inner layer is used as a diffusion barrier layer, diffusion of elements such as Cr from a substrate to a coating and diffusion of oxygen to the substrate in the high-temperature annealing and long-term service process are effectively inhibited, and therefore the thickness of a reaction layer and the thickness of a thermal growth oxide layer are remarkably reduced. The composite coating is compact in structure, stable in component, good in matching with the thermal expansion coefficient of the substrate, excellent in oxidation resistance and low in surface specific resistance, and capable of effectively improving the long-term operation stability and prolonging the service life of the SOC connector.

The application discloses a preparation method of a high-wear-resistance railway turnout coating and relates to the technical field of railway turnout coatings. A surface grafted modified nano tungsten carbide reinforcing phase is formed; a nano composite pre-alloy powder is obtained; a spherical high-entropy alloy composite spraying powder with high fluidity is obtained; a rough anchoring surface with a micron-level staggered grid structure is constructed on the surface of a base material; a base coating substrate with a thermal expansion gradient buffer feature is obtained; an initial cladding coating workpiece is obtained; and the high-wear-resistance railway turnout coating is prepared. The application excludes closed pores in the powder, and significantly improves the density and fluidity of the powder.

The invention discloses a gradient strengthening preparation method of a cast high-entropy alloy composite material based on a laser cladding preform, and belongs to the technical field of metal matrix composite material preparation. The method comprises the following steps: firstly, preparing composite powder of a high-entropy alloy and a nano ceramic reinforced phase by combining plasma-assisted ball milling with a pulse electromagnetic field; then constructing a prefabricated body with a gradient pore structure by adopting an intelligent regulation and control laser cladding technology; the prefabricated body and a congruent-component high-entropy alloy cast ingot are innovatively metallurgically bonded through a vacuum gradient infiltration process, and a large-size overall composite material is prepared; and finally, forming a gradient nanostructure on the surface layer of the material through ultrasonic-assisted laser surface reconstruction and small-deformation gradient heat treatment. According to the method, the technical problems that reinforcing phases are uneven in distribution, the interface bonding strength is low, and large-size components are difficult to prepare are successfully solved, the prepared composite material has the excellent gradient performance that the surface hardness is larger than or equal to 12 GPa, and the core hardness is larger than or equal to 8 GPa, ceramic particles are evenly distributed in a three-dimensional network shape, the 800-DEG C high-temperature oxidation resistance is improved by 30% or above compared with a traditional high-entropy alloy, and the composite material is suitable for large-size components. The method is particularly suitable for manufacturing high-performance key components in the fields of aerospace, national defense and military industry and the like.

The invention discloses a preparation method of a high-entropy alloy composite coating capable of resisting frictional wear in a wide temperature range and the high-entropy alloy composite coating, and the method comprises the following steps: adding SiC and MoS2 ceramic particles into FeCoCrNi high-entropy alloy powder to form mixed powder; the mixed powder is subjected to ball milling treatment, and the mixed powder obtained after ball milling treatment is dried; the surface of the 316L stainless steel substrate is polished, decontaminated and cleaned; and the surface of the treated 316L stainless steel substrate is coated with the treated mixed powder through a laser cladding technology, so that the high-entropy alloy composite coating is formed on the surface of the 316L stainless steel substrate. Thus, based on the synergistic effect of SiC and MoS2 reinforced phases, the high-entropy alloy composite coating has excellent wear resistance and high-temperature stability, especially the antifriction and wear resistance in medium and high temperature areas, and in the preparation process, the high-entropy alloy composite coating is well metallurgically bonded with a 316L stainless steel substrate, so that the wear resistance of the coating is improved. The method has the advantages of compact structure, good cladding quality, uniform structure, high hardness, good wear resistance, no crack and the like.

The application provides a method for preparing a high-entropy alloy composite material. In the application, a high-entropy alloy grid is prepared by using a synchronous laser cladding technology, the high-entropy alloy grid is strengthened by using a heat treatment technology, the high-entropy alloy composite powder is formed by using a hot pressing technology, and finally the hot-pressed composite material is finally formed by using a laser melting technology. The existence of the high-entropy alloy grid can avoid the large-area enrichment of ceramic particles, the preform is prepared by using the hot pressing technology, the combination between the high-entropy alloy grid and the high-entropy alloy composite material in the subsequent melting process is increased, and the aggregation speed of the ceramic particles in the melting process is slowed down, so that the high-entropy alloy composite material is solidified and formed before the ceramic particles are aggregated. Therefore, the high-entropy alloy composite material prepared by the application does not have the aggregation of the reinforcing phase, and the composite material has good strength and toughness.

The medium-thickness plate aluminum alloy composite welding system comprises a stirring head and a double-wire welding gun, the stirring head is arranged on a special machine and is driven by the special machine to move in the welding direction, and the double-wire welding gun is arranged at the tail end of a robot in the using state and is driven by the robot to move in the welding direction during welding. The stirring head is arranged in the front and used for conducting friction stir welding on the splicing position of the two medium-thickness aluminum alloy plates, and the double-wire welding gun is arranged in the rear and used for conducting covering welding on indentations left by welding of the stirring head on the two medium-thickness aluminum alloy plates. The friction stir welding process is firstly adopted, the problems of fusion welding air holes and fast heat conduction of materials are solved, the welding efficiency is high, beveling before welding is not needed, welding materials and protective gas are saved, then double-wire arc welding is adopted for fast cosmetic welding, the problem that friction stir welding seams are slightly lower than base metal is solved, the cosmetic welding seams are thin, most bubbles can directly overflow, and the welding efficiency is high. And air holes are avoided.

This invention discloses a neodymium iron boron (NdFeB) magnet and its preparation method, belonging to the field of NdFeB technology. The NdFeB magnet comprises a NdFeB alloy and a dopant, wherein the dopant includes WC-Pr-based alloy composite micropowder. The NdFeB alloy is melted, spun into powder, hydrogen-cured, and milled using air jet milling to obtain alloy powder. The alloy powder is then mixed with the dopant and oriented and pressed in a magnetic field. The resulting blank undergoes isostatic pressing, vacuum sintering, and tempering heat treatment to obtain the NdFeB magnet. The WC-Pr-based alloy composite micropowder prepared by ball milling combined with low-temperature diffusion annealing forms a composite structure of a hard WC core and a ductile Pr-based alloy shell. This structure can both utilize the grain boundary pinning and dispersion strengthening effect of WC particles to inhibit abnormal growth of the main phase grains and optimize the distribution and composition of the grain boundary phase with the help of the Pr-based alloy, enhancing grain boundary continuity and ductility. This significantly improves the remanence, coercivity, and maximum energy product of the magnet.

The invention discloses a high-performance Al-Mn alloy composite material and a preparation method thereof, and belongs to the technical field of metal material preparation. The material is of a surface layer-core part-surface layer continuous gradient structure, and the surface layer is prepared from 3.5% of Mn, 0.5%-1.0% of Cu, 0.8%-1.0% of Mg, 0.3%-0.8% of Zn, 0.2%-0.3% of Sc, 0.1%-0.2% of Cr, 0.4%-0.6% of TiO2 reinforcement and the balance Al and impurities; and the core part comprises the following components: 0.1 to 0.2 percent of Zr, 0.05 to 0.1 percent of Si, 0.4 to 0.6 percent of Al2O3 reinforcement and the balance of Al and impurities. The preparation method comprises the steps of mechanical powder mixing, gradient cold press molding, hot isostatic pressing densification, homogenization treatment, hot extrusion, annealing treatment and solid solution-two-stage aging treatment. Through gradient component design and a multi-process synergistic process, the strength, toughness and corrosion resistance of the material are synergistically improved, and the material is particularly suitable for power battery shells and other high-performance light-weight structural parts.

The invention belongs to the technical field of high-performance aluminum alloy surface functional coatings, and discloses an aluminum alloy composite wear-resistant coating and a preparation method thereof.The method comprises the steps that the surface of an aluminum alloy matrix is pretreated, so that the surface is clean and dry; through a laser-assisted cold spraying method, dry aluminum alloy powder is sprayed on the surface of the pretreated aluminum alloy matrix, and a laser-assisted cold spraying coating is formed on the surface of the aluminum alloy matrix; a laser-assisted cold spraying coating is polished, cleaned and dried, then micro-arc oxidation treatment is carried out, an Al2O3-based ceramic wear-resistant coating is formed on the surface layer of the laser-assisted cold spraying coating, then cleaning and drying are carried out, and the aluminum alloy composite wear-resistant coating is prepared on the surface of an aluminum alloy matrix. Through the synergistic effect of the two technologies of laser-assisted cold spraying and micro-arc oxidation, the surface friction performance of the aluminum alloy is remarkably improved, and the high requirements of the fields of mechanical manufacturing, aerospace and the like for the wear resistance of aluminum alloy components are met.

The application discloses a kind of high-strength high-wear-resistance polycrystalline diamond compact and preparation method thereof, belong to diamond and hard alloy composite material technical field.The polycrystalline diamond compact includes hard alloy matrix and transition composite coating, powder transition layer and polycrystalline diamond layer sequentially arranged on hard alloy matrix from inside to outside.The graphite and fullerene material are added in polycrystalline diamond layer, and diamond micro powder and fullerene coated diamond micro powder are coated with titanium carbide and silicon carbide, which greatly promotes the combination of diamond and diamond, deposits transition composite coating on the surface of hard alloy matrix, and sets powder transition layer between the transition composite coating and polycrystalline diamond layer, reduces the interface stress between polycrystalline diamond layer and hard alloy matrix, improves the bonding strength of polycrystalline diamond layer and hard alloy matrix, so that it has excellent mechanical and thermal properties.

The application discloses an automobile spoiler assembly and an automobile, and relates to the technical field of automobile aerodynamic outer decoration. The assembly comprises a lightweight composite outer decoration base body, a self-adaptive deformation wing plate, a flexible connecting support and a noise reduction component. The self-adaptive deformation wing plate is made of a memory alloy composite material and is internally provided with heating wires. The self-adaptive angle adjustment is realized by temperature control without the use of a motor and hydraulic drive. The low-speed flatness reduces wind resistance, and the high-speed bending increases the downforce. Meanwhile, the self-adaptive deformation wing plate can be heated to remove ice and snow. The flexible connecting support limits the deformation range, and the base body is embedded with a microporous sound-absorbing layer to absorb airflow noise. The application integrates the functions of self-adaptive deformation, active noise reduction and heating and ice removal. The structure is simplified, the failure rate is low, the lightweight strength is high, the application is suitable for full-condition driving and multi-model assembly, and the problems of poor working condition adaptation, large wind noise, complex structure and easy icing in winter of the traditional spoiler are effectively solved.

The utility model discloses a radiator, which relates to the radiator field, and comprises a support main body and a heat radiation assembly, the support main body comprises at least one support column, the support column extends along a first direction, and the first end of the support column is used for being connected with an external heat source; the heat dissipation assembly comprises a plurality of heat dissipation fins, the multiple heat dissipation fins are arranged outside the supporting body in a sleeving mode and distributed at intervals in the first direction, and at least one heat dissipation hole penetrates through each heat dissipation fin; wherein the support main body and the radiating fins are diamond aluminum alloy composite parts respectively; thus, the supporting body and the cooling fins have high thermal conductivity, the thermal conductivity can reach 400 W / (m.K) or above, the high-temperature resistance is improved to 600 DEG C, and the phenomenon of oxidation and falling is avoided, so that the reliability and durability of the radiator under complex working conditions are improved, and the lightweight design of the radiator is facilitated; at least one radiating hole penetrates through the radiating fin, so that the radiating area is increased, and the weight is further reduced; meanwhile, the multiple cooling fins are arranged at intervals, the heat exchange efficiency can be improved, and then the cooling efficiency is improved.

This invention provides a liquid metal alloy composite phase change material and a resettable thermal fuse, relating to the field of circuit protection device technology. The material is composed of a liquid metal alloy, micro-phase change material capsules, and elastomer molecular chains. The capsules exhibit phase change characteristics, expanding at a preset operating temperature and contracting at a reset temperature. This material can be used in thermal fuses, filled with a microfluidic matrix and integrated with electrowetting electrode pairs. When the temperature exceeds the limit, the capsules expand, driving the liquid metal to flow and disconnect the circuit. When the temperature drops below the reset temperature, voltage is applied through the electrowetting electrodes to reduce interfacial tension, driving the liquid metal to flow back and achieve active reset. This invention combines phase change driving with electrowetting control, realizing programmable protection, status self-diagnosis, and remote communication, and has the advantages of high operating accuracy, rapid reset, and long cycle life.

The present application relates to a kind of production methods of double-layer alloy composite seamless pipe.The outer layer material of double-layer alloy composite seamless pipe is low-carbon steel, the inner layer material is nickel-based alloy, outer layer alloy bar material is continuous casting billet or rolling blank, and inner layer alloy bar material is forging blank.The production steps are: (1) blank preparation; (2) upsetting; (3) blank machining; (4) hot expansion; (5) hot extrusion; (6) heat treatment; (7) surface treatment; (8) cold rolling; (9) finishing treatment.The blank preparation process includes: (1) theoretical calculation; (2) blanking; (3) electroplating; (4) blank assembly; (5) head and tail pad welding.The double-layer alloy composite seamless pipe produced by the present application has firm combination of the inner and outer layers of alloy, reduces the defects of extrusion delamination, the outer layer alloy has high strength, the inner layer alloy has good corrosion resistance, improves the yield rate of processing defects, and reduces material cost.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention belongs to the technical field of metal matrix composite material preparation, and particularly relates to a preparation method of a SiC fiber reinforced titanium alloy composite material precursor ribbon. The SiC fiber reinforced titanium alloy composite material precursor ribbon is prepared by ultrasonic welding, and the preparation of a high-density, high-strength and high-dimensional-precision strip is realized by solid metallurgical bonding of densely arranged precursor filaments and a titanium alloy foil tape with the same material or similar components. The method breaks through the technical bottleneck of a traditional binder process, does not need a degumming procedure, can effectively improve the performance quality and preparation efficiency of the precursor ribbon, is high in precursor ribbon efficiency, high in density, excellent in strength and controllable in size, solves the technical problems of tedious procedures, long preparation period, high porosity, weak interface bonding and the like in the traditional process, and is suitable for industrial production. And a new way is provided for process preparation of the high-performance metal-based composite material structural part.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a high-entropy alloy composite carbon fiber negative electrode material for a lithium ion battery and a preparation method of the high-entropy alloy composite carbon fiber negative electrode material. The electrical property of the composite material formed by the high-entropy alloy and the carbon nanofibers in an equimolar ratio or nearly equimolar ratio design needs to be further improved. In order to solve the problems, the invention provides the high-entropy alloy composite carbon fiber negative electrode material for the lithium ion battery, the high-entropy alloy composite carbon fiber negative electrode material for the lithium ion battery is an electrode material formed by compounding a high-entropy alloy and carbon nanofibers, and the high-entropy alloy is composed of five or seven metal elements according to a non-equimolar ratio or a near molar ratio. The lithium storage capacity of the material can be effectively enhanced, the synergistic effect among multiple principal elements is fully played, the problem of active dilution caused by'averages' is avoided, and the reversible capacity and cycling stability of the composite negative electrode material are remarkably improved.

The application relates to the technical field of textile dyeing and finishing, and particularly discloses a foam nickel loaded nitrogen-doped carbon nanotube / Mn-Zn-P alloy composite material, a preparation method and application thereof. The preparation method is as follows: a calcium carbonate / Ni-Fe alloy layer is prepared on the surface of foam nickel; then, an organic alcohol amine and an alkyne substance are used as a nitrogen source and a carbon source to pre-deposit a nitrogen-containing carbon layer, and subsequently, N2-NH3 and N2-ethylene mixed gas is sequentially introduced to carry out stage-by-stage chemical vapor deposition, so that a Ni / nitrogen-doped carbon nanotube array is obtained; finally, Mn-Zn-P alloy particles are loaded through constant-current electrodeposition. The composite material prepared by the application has high conductivity, excellent corrosion resistance and cycle stability, and provides an ideal electrode material for electrocatalytic hydrogenation reduction, and can be directly used as an indigo reduction electrocatalytic electrode, so that the application has wide industrial application prospects in the field of blue jean dyeing.

The application discloses a preparation method of a magnetic high-entropy alloy composite material, and belongs to the technical field of magnetic material preparation. The saturation magnetization intensity of the magnetic high-entropy alloy composite material can reach 153-172 emu / g, the hardness value can reach 200-233 HV, the tensile strength can reach 600-712 MPa, and the coercive force is less than 200 Oe. The preparation steps comprise the following steps: (1) high-entropy alloy powder preparation; (2) ferrite powder preparation; (3) mixing the powders obtained in the steps (1) and (2) with proper additives; (4) loading into a mold and pressure forming; (5) sintering, and the magnetic high-entropy alloy composite material is obtained. The high-entropy alloy magnetic composite material obtained by reasonably controlling the high-entropy alloy composition, the ferrite composition, the proportion of the two components and the sintering process has excellent mechanical properties and outstanding high-frequency magnetic properties.

The application relates to the field of 3D printing forming technology, in particular to a tungsten / amorphous alloy composite material and a preparation method thereof, which comprises a tungsten matrix framework and amorphous alloy filled in the pores of the tungsten matrix framework. In the preparation, a ball-milled alloyed tungsten-nickel powder is mixed with a polyvinyl alcohol / glycerol non-toxic carrier to prepare a slurry, the slurry is directly printed through inkjet printing, dried and sintered at high temperature to form a reticular framework, and then Zr-based amorphous alloy is infiltrated through pressure and rapidly cooled. The application can solve the problems of large residual stress and easy cracking caused by traditional melting additive manufacturing of high-melting-point metals, the organic carrier is environmentally friendly and stable, and the printing precision is ensured. The obtained composite material is compact in structure, strong in interface bonding force, about 2200 MPa in compressive strength, and more than 19% in plastic strain, so that low-stress and high-performance near-net forming of high-melting-point metal matrix composite materials is realized.

Embodiments of the present application provide a magnesium alloy composite material, a preparation method therefor and a use thereof. The magnesium alloy composite material comprises a magnesium alloy matrix, and a thermal conductivity enhancer and a first metal element dispersed in the magnesium alloy matrix; the magnesium alloy matrix comprises a secondary α-Mg phase and a primary α-Mg phase dispersed in the secondary α-Mg phase; in the magnesium alloy composite material, the total mass percentage of the thermal conductivity enhancer is 5%-30%; the first metal element and the constituent elements of the magnesium alloy matrix form a first intermetallic compound. The magnesium alloy composite material internally simultaneously comprises the primary α-Mg phase, the thermal conductivity enhancer, and the intermetallic compound formed by the first metal element and the constituent elements of the magnesium alloy matrix; under the synergistic effect of the components, the magnesium alloy composite material has both high thermal conductivity and good formability.

The invention belongs to the technical field of aluminum alloy plate preparation, and particularly relates to a high-strength and high-corrosion-resistance aluminum alloy composite plate and a preparation method and application thereof. According to the preparation method, a high-energy-consumption and long-time-consumption homogenizing annealing procedure is omitted for the core material 3003MOD aluminum alloy cast ingot, the core material 3003MOD aluminum alloy cast ingot is directly welded with the skin material alloy (the aluminum alloy 4045 cast ingot and the aluminum alloy 7072 cast ingot) and then is heated and rolled, and the performance of the prepared high-strength and high-corrosion-resistance aluminum alloy composite board is equivalent to that of a composite board produced through a conventional homogenizing process by optimizing rolling parameters; and even better. Specifically, according to the prepared high-strength and high-corrosion-resistance aluminum alloy composite board, the yield strength is larger than or equal to 70.0 MPa, the tensile strength is larger than or equal to 155 MPa, the ductility is larger than or equal to 17%, the cupping value is larger than or equal to 8 mm, the corrosion depth is smaller than 30 microns after copper accelerated salt spray corrosion is conducted for 210 h, and the tensile strength is larger than or equal to 150 MPa.